Method of making coupon receptacles with closure locks



Oct. 8, 1940. I w PQPPE v 2,217,494

METHOD OF MAKING COUPON RECEPTACLES WITH CLOSURE LOCKS 4 Sheets-Sheet 1Gzarye 7 0" c. 19%, m. 19,116,

fiflovuay Oct. 8, 1940. w; PQPPE 2,217,494

METHOD OF MAKING COUPON RECEPTABLES WITH CLOSURE LOCKS Original FiledAug. 27, 1938 4 Sheets-Sheet 2 eozyew ohhe.

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0d. 8, 1940. w PQPPE 2,217,494

METHOD OF MAKING COUPORQECEPTACLES WITH CLOSURE LOCKS Original Filed Au27, 1958 4 Sheets-Sheet s I HI I \R Geor e W. Po

G. W. POPPE METHOD OF MAKING COUPON BECEPTACLES WITH CLOSURE LOCKSOriginal Filed Aug. 27, 1938 4 Shasta-Sheet 4 Patented Oct. 8, 1940UNITED STATES PATENT OFFICE METHOD OF MAKING CGUPON RECEPTA- CLES WITHCLOSURE LOCKS George W. PoDpe, Brooklyn, N. Y., assignor to EquitablePaper Bag 60. Inc., Brooklyn, a corporation of New York Reiiled forabandoned application Serial No.

227,038, August 27,

1938. This application February 29, 1940,. Serial No. 321,450

5 Claims.

This invention relates to a method of producing a receptacle having aclosing flap which may be locked to the walls of the receptacle on beingfolded over onto such walls or within the same and more particularly toa coupon receptacle in which two flaps are provided at the mouth thereofwith the locking elements in the closure flap and in the receptaclewalls, said locking elements being so positioned that after the couponhas been detached, the locking elements in the flap and in thereceptacle walls may be brought into operative relation with each other.

In my Patent 2,009,411, dated July 30, 1935, I have shown several typesof locking closures for receptacles, the locking elements of whichinclude a pair of spaced parallel cuts and cooperating locking tongues.

One of the objects of the present invention is the production of, such alocking closure by a method adapted to be commercially practiced on abag machine without waste of paper.

A further object of the invention is the production'of a coupon baghaving two flaps at the mouth thereof, one of said flaps beingdetachable to serve as a coupon or receipt or be filed as a record andthe other flap adapted to be folded over either inside or outside of thebag, the folded-over flap being provided with a locking elementcooperating with another locking element in the bag walls whereby theflap in its folded-over position may be locked to said walls.

In the drawings- Figure 1 is a longitudinal section with the centralportion broken away, of a bag machine of well known construction withadditions and modifications necessary in the practice of my method;

Figure 2 is a more or less diagrammatic plan view showing the steps inone mode of procedure in the making of a lock coupon receptacle on amachine of the type shown in Figure 1;

Figure 3 is a view showing a bag section after it has been severed fromthe main tube but before the bottom has been folded;

Figure 4 is the reverse of Figure 3 with the bottom folded and thecoupon detached;

Figure 5 is a perspective view of the upper portion of the finished bagwith the detachable coupon partly severed and showing the lockingelements in the undetached coupon and in the bag walls;

Figure 6 is a more or less diagrammatic plan view showing a slightlydiil'erent method of producing a bag tube section than that shown inFigure 2;

Figure 7 is a detail of the upper portion of the machine shown in Figurel but modified to conform to the method of procedure illustrated inFigure-6;

Figure 8 is an elevation and part sectional view along the line 88 ofFigure 7; v

Figure 9 is a perspective view of the finished bag made in accordancewith the method particularly illustrated in Figure 6;

Figure 10 is a longitudinal section of a bag machine somewhat similar tothat shown in Figure 1 but modified to practice the method in a somewhatdifferent way from that shown in Figures 2 and 6;

Figure 11 is a more or less diagrammatic plan view showing the mannerofhandling the web and tube on the machine shown in Figure 10; and

Figure 12 is aperspective view of the upper portion of a bag madeaccording to the method disclosed in Figures 10 and 11.

Referring to Figures 1 and 2, there is a supporting framework 2, theside members of which carry various shafts for driving the usualmechanism of a bag machine. The shaft 4,

Figure 1, may be driven by any suitable means and this shaft furnishespower 'for the rest of the machine. Since machines of this general typehave been in use for a long time, and the details of its operationdescribed in a number of my previous patents, it will be necessary heremerely to outline its general construction and mode of operation.

.The shaft 4 through suitable means drives a belt or chain 6 and throughit the shaft 8 is driven. The latter shaft carries the gear 9 shown indotted outline only, which meshes with a similar gear i0 mounted onshaft II. The latter shaft carries a sprocket l2 for driving a chain itengaging another sprocket on shaft ill at its upper rear portion of themachine. The paper is fed as a web ill from a roll l9 supported on ashaft 20 at the lower right hand portion of the machine, as shownin-Figure 1. The web passes over a guide roller 2| and around animpression roller 22 where the web receives a line of perforations 23,Figure 2, this line of perforations being formed within the margins ofthe web as there shown. Preferably the perforations are made by a bladeZlsupported by a roller 26 on the shaft 8. The various shafts 4, 8 andit each make one rotation for every bag section produced and thereforethe perforations 23 are spaced atv bag section intervals apart in thelongitudinal direction of the web. These perforations form the base ofa. detachable coupon in the finished bag as will be pointed out more indetail hereinafter.

The roller 26 may also carry printing means whereby suitable identifyingmarks may be printed on the web at such positions that such marks willappear on the detachable coupon and one or both walls of the finishedbag. The web after being perforated, passes over a guide roller 26 andaround another roller 36 which reverses its direction of movement. As itpasses about the roller 30 paste is applied to the web. It may beapplied as a single line of paste as shown in Figure 6 or as threeseparate lines as shown in Figure 2.

In the Figure 2 form which the invention may take, three parallel linesof paste are applied in order that the locking elements, subsequently tobe described, may be reenforced bya double thickness of paper. plied asa single line or three lines, a roller 32, Figure 1, is utilized. Thisroller dips into a paste pot 33.

The shaft i6 has mounted thereon two blocks 34, each carrying a die 35,which dies make parallel longitudinal cuts 36 in the web of paper as itpasses over the roller 30, which roller is preferably of hardened steel.The blocks 34 are adjustable along the shaft IS in order that the diesmay be differently spaced for bags of different widths. The spacing, asshown, is such that the parallel longitudinal cuts 36 are spaced apart adistance substantially equal to the length of th line of perforations 23and meet said line. The mounting of the block 34 is more clearly shownin Figure 8 and in so far as the present description has progressed, theconstruction for carrying out the method illustrated in Figures 2 and 6is the same except that in Figure 6 method a single line of paste onlyis applied to the margin of the web.

In the method disclosed in Figure 2,in addition to the blocks 34, thereare also provided two additional blocks 38 on either side of the blocks34. These latter blocks are each provided with a die 40 for forming oneelement of the locking devices. These locking devices consist of a pairof spaced parallel cuts or slits and cooperating locking tongues andeither element of these locking devices or both may be formed in theweb. As disclosed in Figure 2, however, .the dies 40 make the two shortparallel cuts in the web which cuts are located laterally in respect ofthe cuts 36. The die 40 carried by the block 38, at the right handportion of Figure 2, is so located on the shaft 16 that the shortparallel cuts are made on either side of the central line of paste. Inpractice the paste line would be comparatively narrow and the cuts oneither side would be sufficiently spaced from the paste line so that thedies would not be smeared by the paste during the cutting operation.

The cuts made by the left hand die 40 are spaced within the left handmargin of the web and are so located that when the web is folded to formthe tube, the cuts at each margin will register with each other so as toform in effect two parallel cuts substantially in the center of the seamwall of the tube. The cuts thus in register are indicated by thereference character 4| in Figures 3 to 5. v

The folding of the web into a tube is brought about as is usual in bagmachines, by passing the web under a former indicated at 42, Figure 1,the free edges of the web being folded over onto Whether the paste isapthe former and pasted along the overlapped edges, forming a seam. Theformer is supported, as usual, from a cross bar 43, from which depends abracket 44 carried by arms 46 extending forwardly and upwardly from themachine frame.

The web and tube are continuously advanced by means of an upper feedroller 41 and a lower feed roller 46, the upper roller 41 beingadjustable to vary the pressure of the rollers against the tube. Therollers are driven as usual by a connection (not shown) from the shaft4, the ratioof gearing being such that the feed rollers advance the tubea bag section as the shaft 4 .rotates once for each bag tube section.The tube is folded over the former in such a way that the cuts 36 arein. the line of fold and consequently are at the edge of the tube andwill constitute the side edges of two flaps in the finished bag afterthe tube has been severed.

This severing mechanism causes both walls of the tube to be severedalong lines which meet one end of each of the cuts 36. A bag tubesection thus severed is shown near the bottom of Figure 2 and on anenlarged scale in Figure 3. The bottommost section in Figure 2 shows thecompleted bag after the bottom has been folded over onto the seam wall.Before this final bottoming is effected, however, the severed tubesection is acted upon by mechanism which causes the other elements ofthe locking device, namely the locking tongues, to be formed in bothwalls thereof, which locking tongues are so located and their bases soseparated that they may be passed through the cuts 4|. The segmentalcuts forming the locking tongues are also in the seam of the tube andthe segmental portions are on either side of the central paste line asclearly shown in the lower portion of Figure 2.

Before describing the mechanism whereby the locking tongues are producedin the two walls, it will be in order to describe briefly the severingmechanism.

The edge of the former forward of the feed rollers is provided with aserrated edge indicated at 50, Figure 1. Situated Just above the formeris the lip knife 52 which as shown in Figure 2, has a slightly concaveform; The edge of the former, as is usual in machines of this type,severs the lower or plain tube wall while the lip knife severs the upperor seam wall of the tube, the lines of severance meeting at the sideedges of the tube and at one end only of each of the parallellongitudinal cuts 36. The actual severance is brought about by a bar-54known in the art as a striker bar, which is carried by a sprocket chain55, Figure 1, driven by sprockets 56 and supported on shafts 5B and 59.The lower shaft 58 is driven from the shaft 4 by suitable gearingincluding the idler 60 in order that the motion of the sprocket chainand consequently the striker bar or bars, may be in the proper directionto sever the tube from beneath. In a commercial machine, two strikerbars 54 are usually provided.

It is also usual in machines of this type to create some slack at thetime of severance and this is brought about by means of the so-calledpinch bar 62 which bar is in effect a cylinder having a segmentalportion of slightly greater radius than the rest of the bar. Thissegmental portion extends circumferentially only a short distance butsuflicient to retard the motion of the tube momentarily in order thatthe desired slack may be created thereby enabling the striker bar tosever the tube against the serrated edges of the former and lip knife.Since the pinch bar rotates once for each bag section produced, thenecessary retardation is brought about by reason of the fact that itssurface speed is slower than the surface speed of the feed rollers 41and 48. In Figure 1 the walls of the tube are shown as being inengagement with and ready to be severed by the formerand lip knife.

The locking tongues are produced in the tube section, after the tube issevered. For this purpose the leading end of the severed section isgripped by the edge of a segmental roller 63 carried by shaft 64supported in a frame 65, which by means of the rack 66 and pinion 61 maybe adjusted towards or from the pinch bar mechanism. The shaft 68 alsosupported in the frame 65 carries a roller 69 preferably of hardenedsteel and the segmental roller 63 carries a die 10 so shaped as to formthe segmental cuts outlining the locking tongues H, Figure 5. Thesegmental roller 83 and the hardened roller 89 are geared to rotatetogether in a one-to-one ratio. This gearing is not shown in Figure 1,but its construction will readily be understood. Connections by whichthe two rollers are driven from the shaft '3 is brought about by anidler 12 engaging a similar gear on the shaft 4 and a gear on the shaft58 whereby the direction of rotation of the roller 63 is the same asthat of the pinch bar 62, that is clockwise.

After the tube section has been acted upon by the die 10, the bagsection passes on to the cylinders 14 and 15. The cylinder l5 carries atucker blade 16 and a paste applying bar 11 receiving paste from thepaste pot l8. The lower cylinder 15 carries the usual clamp into whichthe bag bottom is thrust by the tucker blade 16 to fold the bottom ofthe severed section along the line H, Figure 3, to thereby form thecompleted bag, one side of which is shown in Figure 4 and the reverseside of which is shown at the bottom in Figure 2.

In the completed article, therefore, two flaps are produced at the bagmouth, the fiap 19, Figure 5, being a continuation (if the plain tubewall and the flap 8| a continuation of the seam wall. The line ofperforations 23 is at the base ofthe fiap 19 which constitutes thedetachable coupon. The seam fiap 8| contains the cuts 4|, The lockingtongues are cut in both bag walls and when the coupon 19 is'detached,the undetached flap may be folded over onto the plain wall of the bagand the locking tongues ll may be snapped through the slits ii to lockthe flap to the bag walls. The flap of course, may be folded inside ofthe bag and the locking also be effected.

In the method as practiced according to the showing in Figures 6, 7 and8, both elements of the locking devices are formed in the web. In orderthat this may be accomplished, the blocks 38, which in the Figure 2arrangement carry only the dies 40, in the arrangement shown in Figures6 and 8, one only of the blocks 38, namely the one at the right inFigure 8, carries the dies 40 while the other block 38 which is locatedbetween the blocks 34 carries the die so shaped as to make the segmentalcuts in the web by which the locking tongues are formed when the web isfolded. These latter dies are indicated by thereference character 80,Figure 8. Therefore, as the web passes over the roller 30 it receivesthe cuts made by the die 40 and the segmental cuts made by the dies 80,in addition to the parallel cuts 36 made by the dies 35. In this form ofthe invention, the seam formed by folding the tube over the former isoffset as clearly shown in Figure 6, with the short cuts in one wallonly and the segmental cuts in both walls of the folded tube. The tubeis severed, as previously described, bythe lip knife and former alonglines which meet one end only of the longitudinal -parallel cuts 36. Inthe method as illustrated in Figure 6, the severed tube passes directlyfrom the pinch bar mechanism to the bottom forming mechanism.

The finished bag shown in Figure 9 resembles Figure 5 in that thedetachable coupon does not contain either element of the locking devicesbut the undetached flap and the walls of .the bag contain thesecomplementary elements.

Figure 9, however, differs from Figure 5 in that neither of the lockingelements is in the seam.

In the method so far described, either of the elements constituting thelocking devices maybe made in the web prior to folding the same into atube. In such case the othere elements of the locking device would bemade in the tube. When both elements of the locking device are made inthe web as shown in Figure 6, there is no need for any further action onthe tube.

In Figures 10 and 11, I have shown. a form in which the locking elementsare both made in the tube section after severance. In Figure l0, so muchof the machine is shown as will serve to illustrate this method ofprocedure. The parts described in connection with Figure 1 whereby theweb receives the line of perforations 23,

Figure 11, and the parallel longitudinal cuts 36, is the same in Figure10. However, this is all of the cutting that is done in the web as thesame passes over the roller 30. The web then passes under the former andis folded over onto the seam to form atube being continuously advancedby the feed rollers 41 and 48 as previously described. The tube is thensevered against the serrated edge of the former and lip knife by theaction of the pinch bar mechanism and the striker bar 54. From the pinchbar mechanism the tube is gripped between'a segmental roller 82 and ahardened steel roller 84 which rollers are driven from the shaft 4 aspreviously described. The roller 84 and the roller 89 are of the samecharacter. ever, from the roller 63 merely in the smaller extent of itscut-out portion, enabling it to accommodate two dies, namely the die 85and the die 86, the die 8'5 being constructed exactly like the die I0and the die 86 being substantially similar to oneof the dies 40. Sincethese dies act upon a tube section, they cut through both walls of saidsection and therefore in the finished It is also to be understood thatthe dies as and 86 are so mounted in the roller 82 asto becircumferentially adjusted thereabout, and of course either die mayoccupy the position of the other so that instead of the short parallelcuts appearing in the flaps as shown in Figure 12, they would appear inthe bag walls. Conversely the segmental cuts forming the tongues wouldappear in the flaps.

The roller 83 differs, how- Various modifications may be resorted towithin the .scope of the invention without departing from the spiritthereof.

This application is refiled for abandoned application Serial No.227,038, filed August 27, 1938.

What I claim is:

l. The method of producing a receptacle with locking elements in theclosure flap and in the receptacle walls; which includes making parallelouts in a web of paper within the margin but near one edge thereof, saidcuts constituting one of the locking elements, folding the web to form atube with the cuts in one wall only thereof, so severing the tube thatone wall projects beyond the other wall at one end of a severed sectionto form a closure flap at the mouth thereof with the cuts within the topedge of the flap, and subsequently making cuts in the tube wallsconstituting the other one of said locking elements, said cuts formingtongues which are adapted to be passed through said parallel cuts in theflap when the latter is in folded-over position,

2. The method of producing a coupon flap receptacle with lookingelements; which includes forming a line of perforations in a web ofpaper within the margin thereof, making longitudinal parallel cutsspaced apart a distance substantially equal to the length of said lineof perforations and meeting such line, making parallel relatively shortcuts in the web located laterally in respect of said longitudinalparallel cuts, folding the 'web to form a tube with the first mentionedparallel cuts in the lines of fold, severing the tube along differentlines so that one Wall is longer than the other at one end of a severedsection, the lines of severance meeting the side edges of the tube atone and only of the first mentioned parallel cuts to produce two flapsat one end of a severed section with the longitudinal cuts forming theside edges of said flaps, one flap containing the relatively short cutsconstituting locking elements and the other flap having the line ofperforations at its base whereby it may readily be detached.

3. The method of producing a coupon flap receptacle with lockingelements; which includes forming a line of perforations in a web ofpaper within the margin thereof, making longitudinal parallel cutsspaced apart a distance substantially equal to the length of said lineof perforations and meeting such line, making parallel relatively shortcuts in the web located laterally in respect of said longitudinalparallel cuts, folding the web with the longitudinal cuts in the line offold to form a tube, severing the tube along lines which meet one end ofeach of said longitudinal cuts thereby producing two flaps at one endof, the severed section, one of said flaps containing the relativelyshort cuts constituting locking elements and the other having the lineof perforations at its base whereby it may readily be severed.

4. The method of producing a coupon flap receptacle with lockingelements; which includes forming a line of perforations in a web ofpaper within the margin thereof, making longitudinal parallel cutsspaced apart a distance substantially equal to the length of said lineof perforations and meeting such line, making parallel relatively shortcuts in the web located laterally in respect of said longitudinalparallel cuts, folding the web to form a tube and severing the tubealong lines which meet one end of each of said longitudinal cuts andsubsequently producing oppositely facing tongues in the tube walls, thebase of the tongues being separated a distance substantially equal tothe distance separating the relatively short cuts.

5. The method of producing a coupon flap receptacle with lockingelements; which includes forming a line of perforations in a web ofpaper within the margin thereof, making longitudinal parallel cutsspaced apart a distance substantially equal to the length of said lineof perforations and meeting such line, making parallel relatively shortcuts in the web located laterally in respect of said longitudinalparallel cuts, folding the web to form a tube and severing the tubealong lines which meet one end of each of said parallel longitudinalcuts to thereby form two flaps at the end of a bag tube section, one ofsaid flaps containing the relatively short cuts and the other having aline of perforations at its base, and subsequently producing oppositelyfacing tongues in the tube walls, the base of the tongues beingseparated a distance substantially equal to the distance separating therelatively

